Coin sorting machine

Details Coin sorting machine Coin sorting machine

1996-01-29

1999-02-16

Bartuska, F. J.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

G07D 508

Patent

active

058710752

ABSTRACT:
A low-cost, high-performance coin sorting machine is provided by providing a plurality of coils which sense coins concurrently and using a simple oscillation circuit to provide oscillation signals at different frequencies, thereby reducing the size of the coin sorting machine. Right and left pairs of sensor coils are composed of inner and outer coils. When either of the connections between one inner coil and other inner coil, and between one outer coil and the other outer coil, is made in a cumulative mode, the other connection is made in a differential mode. The relationship between the oscillation frequencies is set so that one of the frequencies is greater than twice the other.

REFERENCES:
patent: 3870137 (1975-03-01), Fougere
patent: 4963118 (1990-10-01), Gunn et al.
patent: 4995497 (1991-02-01), Kai et al.
patent: 5263566 (1993-11-01), Nara et al.
patent: 5323891 (1994-06-01), Waite

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